[Bug] `npm install` in a sample directory without first `pnpm install` in root project results in `husky not found` error

[mjameswh]

Describe the bug

Since the refactor of the root project to be a PNPM workspace, running npm install in a single sample directory from a fresh git clone of the repository (i.e. without first running pnpm install in the root project) results in an error message to the effect that husky is missing.

How to reproduce

git clone github.com/temporalio/samples-typescript.git
cd samples-typescript/hello-world
npm install

results in

[...]

> prepare
> husky install

sh: husky: command not found
npm error code 127
npm error path /[...]/samples-typescript
npm error command failed
npm error command sh -c husky install

Extra

• We may want to revert fix: added husky to package.json in nextjs ecommerce app #405. That fix probably incorrect.